Encouragement to honor one's neighbor and guest, and the obligation to remain silent unless one has something good to say, and the fact that all of that is part of faith
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا هُشَيْمٌ، عَنْ أَبِي بِشْرٍ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، عَنِ ابْنِ، عَبَّاسٍ - رضى الله عنهما - قَالَ قَدِمَ رَسُولُ اللَّهِ صلى الله عليه وسلم الْمَدِينَةَ فَوَجَدَ الْيَهُودَ يَصُومُونَ يَوْمَ عَاشُورَاءَ فَسُئِلُوا عَنْ ذَلِكَ فَقَالُوا هَذَا الْيَوْمُ الَّذِي أَظْهَرَ اللَّهُ فِيهِ مُوسَى وَبَنِي إِسْرَائِيلَ عَلَى فِرْعَوْنَ فَنَحْنُ نَصُومُهُ تَعْظِيمًا لَهُ . فَقَالَ النَّبِيُّ صلى الله عليه وسلم نَحْنُ أَوْلَى بِمُوسَى مِنْكُمْ " فَأَمَرَ بِصَوْمِهِ
Ibn Abbas (Allah be pleased with both of them) reported that when Allah's Messenger (ﷺ) came to Medina, he found the Jews observing the fast on the day of Ashura. They (the Jews) were asked about it and they said:
It is the day on which Allah granted victory to Moses and (his people) Bani Isra'il over the Pharaoh and we observe fast out of gratitude to Him. Upon this the Messenger of Allah (ﷺ) said: We have a closer connection with Moses than you have, and he commanded to observe fast on this day.
Reference: Sahih Muslim 1130 a In-book : Book 13, Hadith 162 USC-MSA web (English) : Book 6, Hadith 2518 (deprecated)
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